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4-6" STL Lift Kit Stage 1 System 2020 GM HD 2500 / 3500

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The 2020 Chevy Silverado / GMC Sierra 2500HD 4-6" High Clearance Lift by CST Suspension will not disappoint. The 4 to 6 inch adjustable high clearance lift kit is designed to keep the stock torsion location under the truck. The 2020 Silverado / Sierra 2500HD 4-6" lift provides the leveled look without compromising the ride quality or function. CST Suspension engineers their suspension to provide increased strength, performance, overall ride quality, and allow your truck to perform better than stock with many upgrades.

This 4-6" adjustable lift kit for the 2020 Chevy Silverado / GMC Sierra 2500HD includes gusseted high clearance cross-members with a full size differential skid plate, cast iron CNC machined front steering knuckles, differential drop brackets, heavy duty bump stop brackets, extended sway bar end links, brake line drop brackets, all necessary install hardware, and O.E. front shock extensions. Steering stabilizer brackets are built into the kit and stabilizer shock kit can be purchased as an optional upgrade. No cutting of the front differential is required or welding of any kind to install this kit. Retaining the factory front wheel track width allows this kit to work perfectly with all of the trucks stability assist features including the GM StabiliTrak system.


  • 4-6" Adjustable Lift Height (Level Stance at 4" Lift)
  • Fits 37" Tires w/ Minor Trimming
  • Superior CV and Tie-Rod Angles
  • High Clearance, Fully Boxes Crossmembers
  • Includes Steel Lower Skid-Plate to Protect Front Diff
  • Stock Torsion Location for Maximum Ground Clearance
  • Overall Trac Width Remains Near Factory
  • Ability to re-use O.E. Shocks (Kit Includes Shock Extensions)
  • NO GM Stabilitrak Issues
  • High Quality Gloss Black Powder Coat Finish
  • NO Welding Required
  • Made In The U.S.A.

Install Notes:

  • Torsion Keys Required for 5-6 Inches of Lift
  • Additional Rear Lift Required for Level Stance when Keys are Added
  • 3500 Models May Require Longer Rear U-Bolts

Suggested Wheel/Tire Sizes:
Wheel Sizes:
18 x 9" w/ 5" Backspace
20 x 9" w/ 5" Backspace

Tire Sizes:
35" x 12.5" (NO Trimming)
37" x 12.5" (Minor Trimming Required)

Included Parts:

  • CSS-C3-23-B2 (x1) SPINDLES

This Part Fits:

2020 Chevrolet Silverado 2500 HD

2020 Chevrolet Silverado 3500 HD

2020 GMC Sierra 2500 HD

2020 GMC Sierra 3500 HD

Adjustable Ride Height:
Lift Height:
4 Inch
Lift Height:
5 Inch
Lift Height:
6 Inch
Suspension Lift Kit
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